diff options
| author | Ritesh Harjani (IBM) <ritesh.list@gmail.com> | 2023-04-21 12:46:17 +0300 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2023-05-16 12:32:42 +0300 |
| commit | 6e335cd789bee7a7111c4fe6d46b1d63cde81511 (patch) | |
| tree | 6ccc3ec6c4c29961d81a987da777671c810a7ee6 /fs/ext2/file.c | |
| parent | fb5de4358e1aa4753dce73c4dc1aca73ff39cedd (diff) | |
| download | linux-6e335cd789bee7a7111c4fe6d46b1d63cde81511.tar.xz | |
ext2: Add direct-io trace points
This patch adds the trace point to ext2 direct-io apis
in fs/ext2/file.c
Here is how the output looks like
a.out-467865 [006] 6758.170968: ext2_dio_write_begin: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT|WRITE aio 1 ret 0
a.out-467865 [006] 6758.171061: ext2_dio_write_end: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 0 flags DIRECT|WRITE aio 1 ret -529
kworker/3:153-444162 [003] 6758.171252: ext2_dio_write_endio: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT|WRITE aio 1 ret 0
a.out-468222 [001] 6761.628924: ext2_dio_read_begin: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT aio 1 ret 0
a.out-468222 [001] 6761.629063: ext2_dio_read_end: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 0 flags DIRECT aio 1 ret -529
a.out-468428 [005] 6763.937454: ext2_dio_write_begin: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT aio 0 ret 0
a.out-468428 [005] 6763.937829: ext2_dio_write_endio: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT aio 0 ret 0
a.out-468428 [005] 6763.937847: ext2_dio_write_end: dev 7:12 ino 0xe isize 0x1000 pos 0x1000 len 0 flags DIRECT aio 0 ret 4096
a.out-468609 [000] 6765.702878: ext2_dio_read_begin: dev 7:12 ino 0xe isize 0x1000 pos 0x0 len 4096 flags DIRECT aio 0 ret 0
a.out-468609 [000] 6765.703243: ext2_dio_read_end: dev 7:12 ino 0xe isize 0x1000 pos 0x1000 len 0 flags DIRECT aio 0 ret 4096
Reported-and-tested-by: Disha Goel <disgoel@linux.ibm.com>
[Need to add CFLAGS_trace for fixing unable to find trace file problem]
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <b8b0897fa2b273a448d7b4ba7317357ac73c08bc.1682069716.git.ritesh.list@gmail.com>
Diffstat (limited to 'fs/ext2/file.c')
| -rw-r--r-- | fs/ext2/file.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ext2/file.c b/fs/ext2/file.c index 98add36c1a59..7a32f202908e 100644 --- a/fs/ext2/file.c +++ b/fs/ext2/file.c @@ -29,6 +29,7 @@ #include "ext2.h" #include "xattr.h" #include "acl.h" +#include "trace.h" #ifdef CONFIG_FS_DAX static ssize_t ext2_dax_read_iter(struct kiocb *iocb, struct iov_iter *to) @@ -168,9 +169,11 @@ static ssize_t ext2_dio_read_iter(struct kiocb *iocb, struct iov_iter *to) struct inode *inode = file->f_mapping->host; ssize_t ret; + trace_ext2_dio_read_begin(iocb, to, 0); inode_lock_shared(inode); ret = iomap_dio_rw(iocb, to, &ext2_iomap_ops, NULL, 0, NULL, 0); inode_unlock_shared(inode); + trace_ext2_dio_read_end(iocb, to, ret); return ret; } @@ -198,6 +201,7 @@ static int ext2_dio_write_end_io(struct kiocb *iocb, ssize_t size, mark_inode_dirty(inode); } out: + trace_ext2_dio_write_endio(iocb, size, error); return error; } @@ -214,7 +218,9 @@ static ssize_t ext2_dio_write_iter(struct kiocb *iocb, struct iov_iter *from) unsigned long blocksize = inode->i_sb->s_blocksize; loff_t offset = iocb->ki_pos; loff_t count = iov_iter_count(from); + ssize_t status = 0; + trace_ext2_dio_write_begin(iocb, from, 0); inode_lock(inode); ret = generic_write_checks(iocb, from); if (ret <= 0) @@ -242,7 +248,6 @@ static ssize_t ext2_dio_write_iter(struct kiocb *iocb, struct iov_iter *from) /* handle case for partial write and for fallback to buffered write */ if (ret >= 0 && iov_iter_count(from)) { loff_t pos, endbyte; - ssize_t status; int ret2; iocb->ki_flags &= ~IOCB_DIRECT; @@ -268,6 +273,9 @@ static ssize_t ext2_dio_write_iter(struct kiocb *iocb, struct iov_iter *from) out_unlock: inode_unlock(inode); + if (status) + trace_ext2_dio_write_buff_end(iocb, from, status); + trace_ext2_dio_write_end(iocb, from, ret); return ret; } |